TW201815183A - Techniques for handovers in the presence of directional wireless beams - Google Patents

Abstract

Techniques are disclosed for handover of a user equipment (UE) from a serving base station to a target base station. A target base station may use one or more directional beams to establish wireless communication links with UEs within a coverage area of the target base station. Directional beams may create a narrow-beam, high-bandwidth connection with a UE in a limited geographic area. Handover procedures include some latency between when a target base station dedicates resources to a UE and when the UE executes a communication via those dedicated resources. To compensate for latencies in a handover procedure and for the geographic limitations of directional beams, a target base station may assign multiple directional beams to the UE during a handover procedure. Each directional beam may be associated with access parameters used by the UE to generate messages (e.g., a RACH message) during the handover procedure.

Description

Techniques for handover in the presence of directional wireless beams

This patent application claims the priority of the following applications: The name of Nagaraja et al., Which was assigned to the assignee of this application and was filed on September 13, 2017, is "TECHNIQUES FOR HANDOVERS IN THE PRESENCE OF DIRECTIONAL WIRELESS BEAMS" U.S. Patent Application No. 15 / 703,460; and the name assigned to the assignee of this case, filed on September 17, 2016, Nagaraja et al. Is "TECHNIQUES FOR HANDOVERS IN THE PRESENCE OF DIRECTIONAL WIRELESS" BEAMS "US Provisional Patent Application No. 62 / 396,149, which is expressly incorporated herein by reference in its entirety.

In summary, the following relates to handover of a user equipment (UE) from a serving base station to a target base station, and more specifically, the following relates to techniques for handover in the presence of a directional wireless beam.

Wireless communication systems have been widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, and more. These systems can support communication with multiple users by sharing the available system resources (eg, time, frequency, and power). Examples of such multiplexed access systems include code division multiplexed access (CDMA) systems, time division multiplexed access (TDMA) systems, frequency division multiplexed access (FDMA) systems, and orthogonal frequency division multiplexed Access System (OFDMA) system (eg, Long Term Evolution (LTE) system). The wireless multiplexing communication system may include several base stations, and each base station simultaneously supports communication for multiple communication devices (which may also be referred to as user equipment (UE)).

In some examples, a UE handover procedure between base stations may be performed to maintain the UE's connection to the wireless communication system. Such switching procedures may include some delay between communications.

The described technique relates to an improved method, system, device, or apparatus that supports techniques for handover in the presence of a directional wireless beam. Generally, the described technology provides that a target base station can use one or more directional beams to establish a wireless communication link with a UE within the coverage area of the target base station. A directional beam can establish a narrow beam, high frequency bandwidth connection with a UE in a limited geographic area. The handover procedure includes at least some delay between when the target base station dedicates resources to the UE and when the UE performs communication via those dedicated resources. During this delay, the UE may move away from the effective range of the directional beam dedicated to the UE. To compensate for the delay in the handover procedure and the geographical limitation of the directional beam, the target base station may allocate multiple directional beams for use by the UE during the handover procedure. Each directional beam may be associated with an access parameter used by the UE to generate a message (eg, a random access channel (RACH) message) during a handover procedure.

A method for handover of a UE from a serving base station to a target base station is described. The method may include: receiving a measurement report; and generating a first message based at least in part on the measurement report via the target base station, the first message including a plurality of orientations for the UE and the target base station Each of the wireless communication links directs access parameters of the wireless communication link; and sends the first message to the UE via the serving base station.

An apparatus for handover of a UE from a serving base station to a target base station is described. The apparatus may include: a unit for receiving a measurement report; and a unit for generating a first message based at least in part on the measurement report via the target base station, the first message including the UE and the target Each of the plurality of directional wireless communication links between the base stations directs the access parameter of the directional wireless communication link; and a unit for sending the first message to the UE via the serving base station.

Another device for handover of a UE from a serving base station to a target base station is described. The device may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to: receive a measurement report; and generate a first message based at least in part on the measurement report via the target base station, the first message including information for the UE and Each of the plurality of directional wireless communication links between the target base station directs access parameters of the wireless communication link; and sends the first message to the UE via the serving base station.

A non-transitory computer-readable medium for handover of a UE from a serving base station to a target base station is described. The non-transitory computer-readable medium may include instructions operable to cause the processor to: receive a measurement report; and generate, by the target base station based at least in part on the measurement report, a first message, the first message Including access parameters for a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station; and sending the first message to the UE via the serving base station.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: from the total number of directional wireless communication links associated with the target base station, The plurality of directional wireless communication links are selected to be included in the first message.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: determining the values of these access parameters for each directional wireless communication link . In some cases, the determined values of the access parameters are based at least in part on the estimated delay, network traffic, mobility parameters of the UE, availability of communication resources, or a combination thereof.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: using at least one of the directional wireless communication links to A communication link is established with the UE. In some cases, at least one of the directional wireless communication links used in the directional wireless communication links is included in the first message.

In some examples of the above methods, devices, and non-transitory computer-readable media, the first message makes a random access channel (RACH) resource dedicated to the UE.

In some examples of the above methods, devices, and non-transitory computer-readable media, the access parameters include a preamble signal index for each directional wireless communication link included in the first message, a physical randomness Access channel (PRACH) mask index or beam index.

In some examples of the above method, device, and non-transitory computer-readable medium, the access parameters include a response window for each directional wireless communication link included in the first message, the response message The window includes a start time and a duration for the UE to monitor the directional wireless communication link associated with the response window.

In some examples of the above methods, devices, and non-transitory computer-readable media, the response window associated with one or more of the directional wireless communication links is not associated with other directional wireless communication links. The response window associated with the wireless communication link overlaps.

In some examples of the above method, device, and non-transitory computer-readable medium, the access parameters include a transmission window for each directional wireless communication link included in the first message, the transmission message The window indicates a dedicated time period for receiving a second message from the UE via a specific directional wireless communication link of the plurality of directional wireless communication links.

In some examples of the above methods, devices, and non-transitory computer-readable media, the access parameters include priority information associated with the plurality of directional wireless communication links, the priority information indicating the plurality of directional Ranking of wireless communication links.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for the following operations: based at least in part on the access parameters included in the first message, Receiving a second message from the UE via one of the directional wireless communication links included in the first message.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units or instructions for: via the directional wireless communication links included in the first message The one directional wireless communication link sends a response to the second message.

In some examples of the above methods, devices, and non-transitory computer-readable media, the second message may be a random access channel (RACH) message.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units or instructions for: via each of the directional wireless communication links included in the first message One directs the wireless communication link and receives the second message. Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units or instructions for: via each of the directional wireless communication links included in the first message One directs the wireless communication link and sends a response.

In some examples of the above method, device, and non-transitory computer-readable medium, the measurement report and the first message may be relayed by the serving base station between the UE and the target base station.

In some examples of the above methods, devices, and non-transitory computer-readable media, the plurality of directional wireless communication links may be millimeter wave (mmW) communication links.

A method for handover of a UE from a serving base station to a target base station is described. The method may include: sending a measurement report; receiving a first message at the UE, the first message including directional wireless communication for each of a plurality of directional wireless communication links between the UE and the target base station The access parameter of the link, the first message is based at least in part on the measurement report; and based at least in part on the access parameters included in the first message, via the directional wireless communication link At least one directional wireless communication link to send the second message.

An apparatus for handover of a UE from a serving base station to a target base station is described. The device may include: a unit for sending a measurement report; a unit for receiving a first message at the UE, the first message including a plurality of directional wireless communication chains for the UE and the target base station Each of the channels directs the access parameters of the wireless communication link, the first message is based at least in part on the measurement report; and is used at least in part based on the access parameters included in the first message A unit for sending a second message via at least one of the directional wireless communication links.

Another device for handover of a UE from a serving base station to a target base station is described. The device may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to: send a measurement report; receive a first message at the UE, the first message including a plurality of directional radios between the UE and the target base station Each of the communication links directs access parameters of the wireless communication link, the first message is based at least in part on the measurement report; and based at least in part on the access parameters included in the first message Sending the second message via at least one of the directional wireless communication links.

A non-transitory computer-readable medium for handover of a UE from a serving base station to a target base station is described. The non-transitory computer-readable medium may include instructions operable to cause the processor to: send a measurement report; receive a first message at the UE, the first message including information for the UE and the target base station Each of a plurality of directional wireless communication links between the directional wireless communication link access parameters, the first message is based at least in part on the measurement report; and based at least in part on the first message The included access parameters send a second message via at least one of the directional wireless communication links.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: determining a response window for each directional wireless communication link. In some cases, the decision on the response window for each directional wireless communication link is based at least in part on the access parameters included in the first message.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for the following operations: during the response window, monitoring the selected response to the second message. A directional wireless communication link, and the response window is associated with the selected directional wireless communication link.

In some examples of the above methods, devices, and non-transitory computer-readable media, the response window associated with one or more of the directional wireless communication links is not associated with the directional wireless communication link. The response window associated with any other directional wireless communication link in the directional wireless communication link overlaps.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for the following operations: a directional wireless selected with at least one of the plurality of directional wireless communication links During the response window associated with the communication link, at least one response to the second message is received via the at least one selected directional wireless communication link.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units or instructions for: measuring the first signal strength of the serving base station and the Second signal strength. Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: generating based at least in part on the first signal strength and the second signal strength The measurement report.

In some examples of the above methods, devices, and non-transitory computer-readable media, the first message may make a random access channel (RACH) resource dedicated to the UE.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: selecting one or more directional wireless communications of the plurality of directional wireless communications links link. In some cases, this selection of one or more directional wireless communication links may be based at least in part on priority information. In some cases, the selection of one or more directional wireless communication links may be based at least in part on channel conditions of the directional wireless communication links as measured by the UE.

Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: determining the mobility status of the UE. Some examples of the above methods, devices, and non-transitory computer-readable media may also include programs, features, units, or instructions for: generating the measurement report including the mobility state of the UE.

In some examples of the above methods, devices, and non-transitory computer-readable media, the second message may be a RACH message.

This document describes techniques used during a handover procedure when a directional wireless beam is used to establish a communication link between a base station and a UE. In some handover procedures (for example, in non-contention handover in LTE), the target base station may generate a configuration message (for example, an RRCConnectionReconfiguration message), which specializes some random access channel (RACH) resources For the UE during the handover procedure. Since the direct communication link between the UE and the target base station is yet to be established, the configuration message can be relayed to the UE by the source base station. After the UE receives the configuration message, the UE can decode the message, generate a RACH message based on the configuration message, and send a RACH message. These operations introduce some delay between when the RACH resources are dedicated by the target base station and when the dedicated RACH resources are used by the UE.

In addition, the target base station can use a directional wireless beam to establish a communication link with UEs within its coverage area. Wireless communications via beamforming can be associated with highly directional narrow beams (eg, "pen beams") to minimize and / or reduce inter-link interference and provide high-frequency broadband links, but these beams are also limited Geographically valid. In some examples, the target base station can operate in the millimeter wave (mmW) frequency range.

The delay in the handover procedure combined with the limited effective geographic area of the directional beam may cause the handover procedure to fail. If the target base station dedicates a single directional beam resource to the UE during the handover procedure, the UE may move away from the effective range of the single directional beam resource between the time dedicated to the resource and the time the UE attempts to use the resource. Therefore, during the delay in the handover procedure, the UE may move away from the range of resources dedicated to the target base station.

Techniques for allocating multiple directional beams to a UE during a handover are described herein. The target base station may select a plurality of directional beams to be dedicated to the UE during the handover. The target base station may then determine the access parameters for the directional beam for each of the selected plurality of directional beams. The target base station may include a plurality of directional beams and access parameters in the configuration message. Since the UE does not know which directional beam will be most effective for establishing a communication link with the target base station, the UE may generate one or more RACH messages and place the beams on each of the plurality of directional beams included in the configuration message. Send one or more RACH messages. In this way, a switching procedure in the presence of a directional beam can be performed more reliably.

Various aspects of the content of this case were initially described in the context of a wireless communication system. Various aspects of the content of this case can be shown and described with reference to the communication mechanism diagram related to the switching procedure. Aspects of the content of this case are also shown and described with reference to device diagrams, system diagrams, and flowcharts related to techniques for handover in the presence of directional wireless beams.

FIG. 1 illustrates an example of a wireless communication system 100 according to various aspects of the content of the present application. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be an LTE (or improved LTE) network. This article describes a technique that takes into account the delay in the handover procedure and the use of directional wireless beams to establish a communication link between the base station 105 and the UE 115. As discussed herein, multiple directional wireless beams can be used in a handover procedure to address the described challenges. In addition, the access parameters associated with the directional wireless beam may be used by the UE 115 to perform various aspects of the handover procedure.

The base station 105 may perform wireless communication with the UE 115 via one or more base station antennas. Each base station 105 may provide communication coverage for a corresponding geographic coverage area 110. As the UE 115 moves through the coverage area 110, the UE 115 may "handover" to other base stations 105 in order to maintain the connection. Such events can be referred to as handovers. To perform handover, the wireless communication system 100 may define a plurality of different handover procedures (for example, a contention handover procedure or a non-contention handover procedure).

The communication link 125 shown in the wireless communication system 100 may include an uplink (UL) transmission from the UE 115 to the base station 105 or a downlink (DL) transmission from the base station 105 to the UE 115. UEs 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 can also be called mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal , Wireless terminal, remote terminal, handheld device, user agent, mobile service client, client, or some other suitable term. UE 115 can also be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop, wireless phone, personal electronic device, handheld device, personal computer, wireless area Loop (WLL) station, Internet of Things (IoT) equipment, Internet of Things (IoE) equipment, machine type communication (MTC) equipment, home appliances, automobiles, etc.

The base station 105 can communicate with and communicate with the core network 130. For example, the base station 105 is interfaced with the core network 130 via a return link 132 (eg, S1, etc.). The base stations 105 may communicate with each other directly or indirectly (eg, via the core network 130) on the backhaul link 134 (eg, X2, etc.). In some examples, the base stations 105 may directly communicate with each other via the backhaul link 134 to initiate a handover procedure for the UE 115. The base station 105 may perform radio configuration and scheduling for communication with the UE 115, or the base station 105 may operate under the control of a base station controller (not shown). In some examples, the base station 105 may be a macro cell, a small cell, a hot spot, or the like. The base station 105 may also be referred to as an eNodeB (eNB) 105.

FIG. 2 illustrates an example of a block diagram of a wireless communication system 200 of a technique for handover in the presence of a directional wireless beam. The wireless communication system 200 may be an example of the wireless communication system 100 discussed with reference to FIG. 1. The wireless communication system 200 includes a serving base station 205 and a target base station 210. The coverage areas 215, 220 may be defined for their respective base stations 205, 210. The serving base station 205 and the target base station 210 may be examples of the base station 105 described with reference to FIG. 1. Therefore, the characteristics of the base stations 205, 210 may be similar to those of the base station 105.

The serving base station 205 and the target base station 210 may communicate via a backhaul link 225. The backhaul link 225 may be a wired backhaul link or a wireless backhaul link. The backhaul link 225 may be configured to transfer data and other information between the serving base station 205 and the target base station 210. The backhaul link 225 may be an example of the backhaul link 134 described with reference to FIG. 1.

The serving base station 205 may establish a communication link 230 with the UE 115. The backhaul link 230 may be an example of the backhaul link 125 described with reference to FIG. 1. One characteristic of the UE 115 in the wireless communication system 200 is that the UE 115 may be mobile. Since the UE 115 can change its geographic location in the wireless communication system 200, in order to maintain the connection, the UE 115 may desire to terminate its connection with the serving base station 205 and establish a new connection with the target base station 210. For example, as the UE 115 moves, the UE 115 may approach the boundary of the coverage area 215 of the serving base station 205. However, at the same time, the UE 115 may pass within the coverage area 220 of the target base station 210. In some examples, UE 115 may determine mobility parameters 235 of UE 115. The mobility parameter 235 may indicate that the UE 115 is at a specific location, is traveling at a specific speed in a specific direction, other information related to the mobility of the UE 115, or a combination thereof. When the UE 115 approaches the boundary of the coverage area 215 of the serving base station 205, a handover procedure of the UE 115 between the serving base station 205 and the target base station 210 may be initiated.

In some examples of new radio (NR), the target base station 210 may communicate with the UE 115 via a directional wireless communication link 240 (sometimes referred to as a directional wireless beam or directional beam). The directional wireless communication link 240 may point in a specific direction and provide a high-frequency broadband link between the target base station 210 and the UE 115. Signal processing techniques (eg, beamforming) may be used to coherently combine energy and thus form a directional wireless communication link 240. Wireless communications via beamforming can be associated with highly directional narrow beams (eg, "pen beams") to minimize and / or reduce interlink interference and provide wireless nodes (eg, base stations, access points, UE, etc.). In some examples, the target base station 210 may operate in a mmW frequency range (eg, 28 GHz, 40 GHz, 60 GHz, etc.). In some examples, the directional wireless communication link 240 is transmitted using more than 6 GHz. Wireless communication at these frequencies may be associated with increased signal attenuation (eg, path loss) that may be affected by various factors such as temperature, air pressure, diffraction, etc. Dynamic beam steering and beam search capabilities can also support discovery, link establishment, and beam refinement in the presence of dynamic shadows and Rayleigh fading, for example. In addition, communication in such mmW systems can be time-division multiplexed, where transmission can only be directed to one wireless device at a time due to the directionality of the transmitted signal.

Each directional wireless communication link 240 may have a beam width 245. The beam width 245 for each directional wireless communication link 240 may be different (eg, the beam width 245-a of the directional wireless communication link 240-a and the beam width 245- of the directional wireless communication link 240-c c for comparison). The beam width 245 may be related to the size of the phased array antenna used to generate the directional wireless communication link 240. Different beam widths 245 can be used by the target base station 210 in different scenarios. For example, the first message may be transmitted / received using a directional wireless beam having a first beam width, and the second message may be transmitted / received using a directional wireless beam having a second beam width different from the first beam width. The target base station 210 may generate any number of directional wireless communication links 240 (eg, directional wireless communication links 240-N). The directional wireless communication link 240 generated by the target base station 210 can point to any geographic location.

As the UE 115 moves in the wireless communication system 200, the UE 115 may move away from the effective range of a specific directional wireless communication link (for example, see directional wireless communication link 240-a). Due to the narrow beam width 245 of the directional wireless communication link 240, the directional wireless communication link 240 can provide coverage to a small geographic area. In contrast, omnidirectional wireless communication links radiate energy in all directions and cover a wide geographic area.

When the target base station 210 establishes a communication link with the UE 115 using the directional wireless communication link 240, it may also complicate the handover procedure. In some examples, the switching procedures discussed herein are non-contention switching procedures. Control messages exchanged during the handover procedure may have a delay between sending and receiving. Therefore, there may be a time delay between when the target base station 210 allocates resources to the UE 115 and when the UE 115 can perform operations using those allocated resources. In some examples, the switching procedure may have a delay spanning tens to hundreds of milliseconds. Due to UE mobility, rotation, or signal blocking, the channel characteristics of the directional wireless communication link 240 may change over time. Specifically, the channel characteristics of the assigned directional wireless communication link 240 may change during the delay of the handover procedure. If a single resource is allocated during the handover procedure (for example, a single directional wireless communication link 240), the handover procedure may fail due to insufficient signals later in the procedure. Accordingly, the handover procedure may be adjusted to take into account multiple directional wireless beams, which may be used to establish a communication link between the target base station 210 and the UE 115 during the handover procedure.

FIG. 3 illustrates an example of a communication mechanism 300 of a technique for handover in the presence of a directional wireless beam. The communication mechanism 300 indicates communication between the UE 115, the serving base station 205, and the target base station 210. The communications and procedures discussed in the communication mechanism 300 may be used to perform a handover procedure when the target base station uses the directional wireless communication link 240. In some examples, the handover procedure is a non-contention handover procedure.

At block 305, the UE 115 may generate a measurement report 310. The measurement report 310 may include measurements related to any number of measurement events. The measurement report 310 may indicate that a handover procedure for the UE 115 between the serving base station 205 and the target base station 210 may be performed. For example, in the LTE system, the NR system, and / or the like, the measurement report 310 may include: a first report (A1), which may be triggered when a serving cell becomes better than a threshold; a second report (A2 ), Which can be triggered when the serving cell becomes worse than the threshold; the third report (A3), which can be triggered when the adjacent cell becomes better than the main serving cell by an offset value; the fourth report (A4 ), Which can be triggered when neighboring cells become better than the threshold; the fifth report (A5), which can be performed when the main serving cell becomes worse than the threshold and the neighboring cells are better than another (for example, High) threshold is triggered; the sixth report (A6), which can be triggered when an adjacent cell becomes better than the auxiliary service cell, an offset value; the seventh report (B1), which can be used when different radios are used Triggered when the neighbors of the access technology (RAT) become better than the threshold; and the eighth report (B2), which can be worse than the threshold of the main service cell and the neighbors between the RATs become better than another Triggered on threshold.

The measurement report 310 may be transmitted from the UE 115 to the serving base station 205 and from the serving base station 205 to the target base station 210. At this point during the handover procedure, the UE 115 may also not have established a direct communication link with the target base station 205. Therefore, during some stages of the handover procedure, the serving base station 205 may function as a communication repeater between the UE 115 and the target base station 210. In some examples, the measurement report 310 may be transmitted via the communication link 230 and the backhaul link 225.

Upon receiving the measurement report 310, at block 315, the target base station 210 may generate a configuration message 320, which includes access parameters for a plurality of directional wireless communication links 240 (eg, directional wireless beams). Generating the configuration message 320 may include determining information about the UE 115 according to the measurement report 310 (for example, the relative position of the UE and one of the base stations 205 and 210), directly determining information about the UE 115, and collecting other information about the UE 115 Information or any combination thereof. In some examples, the directional wireless communication link included in the configuration message 320 may be selected from the total number of directional wireless communication links 240 that the target base station 210 can generate. The plurality of directional wireless communication links may be selected based at least in part on: network delay, network traffic, mobility parameters of UE 115, previous radio link failure (RLF), other information, or other random combination. In some examples, the serving base station 205 may identify a need to include multiple directional wireless communication links in the configuration message 320. In such an example, the serving base station 205 may notify the target base station 210 of providing a plurality of directional wireless communication links in the configuration message 320.

The configuration message 320 may include access parameters for each of the plurality of directional wireless communication links. The access parameters for each directional wireless communication link may include, for example, one or more of the following: preamble signal index, physical random access channel (PRACH) mask index, beam index, transmission window, Response window, priority information, power level, or any combination thereof.

4 illustrates an example of a table 400 of access parameters 405 in a configuration message 320 of a technique for handover in the presence of a directional wireless beam. Form 400 is provided as an illustrative example only. The access parameters 405 may be organized according to other configurations or data structures. Table 400 shows the directional wireless communication link 240 in the leftmost column. In the subsequent columns, table 400 shows the access parameters 405 associated with the directional wireless communication link 240. The configuration message 320 may include any number of (eg, N) directional wireless communication links 240. A first subset of access parameters 405-a may be associated with a single directional wireless beam (eg, 240-a). A second subset of the access parameters 405-b may be associated with different directional wireless beams (eg, 240-b). As shown in table 400, the value of the access parameter 405 associated with each directional wireless beam may be unique relative to other values (eg, A_1, B_1, ... N_1). In some examples, other categories of access parameters 405 may be included in the configuration message 320. For example, as shown in table 400, the preamble signal index, PRACH mask index, beam index, transmission window, response window, other parameters, or any combination thereof may be included in the configuration message 320. The categories included in the table 400 are for illustrative purposes only.

In some examples, the configuration message 320 may be an instance of an RRCConnectionReconfiguration message. In some examples, the configuration message 320 may include mobilityControlInfo. In some examples, the configuration message 320 may be an instance of a mobilityControlInfo message.

In some examples, each directional wireless communication link 240 may be associated with a transmission window 410. In some handover procedures, when a dedicated preamble signal is used, the target base station 210 dedicates a specific duration to receiving a RACH message from the UE 115 to which the dedicated preamble signal is assigned. The sending signal window 410 may indicate the start time of the specific duration and the end time of the specific duration, the duration of the specific duration, other characteristics of the specific duration, or any combination thereof. In some examples, the transmission window 410 may be determined by the target base station 210.

In some examples, each directional wireless communication link 240 may be associated with a response window 415. In some examples, the UE 115 can monitor only one directional wireless communication link 240 at a time. To avoid missing any response to the RACH message, the response window 415 may indicate a dedicated duration for the UE 115 to monitor the specific directional wireless communication link 240 for the response. The response window 415 may indicate a start time, an end time, a duration, other characteristics, or any combination thereof related to the dedicated duration. In some examples, the response window 415 may be determined by the target base station 210.

The target base station 210 may decide a response window 415 for each directional wireless communication link 240 so that no response window 415 overlaps another response window 415. Because the UE can monitor only one directional wireless beam at a time, a dedicated time for monitoring each beam is set aside as a response window 415. The access parameter 405 may include expressing the information of the response window 415 in time, sub-frame, time slot, mini-time slot, or any combination thereof. For example, the starting time of the response window 415 may be a certain sub-frame. In another example, the response windows 415 (A_5 and B_5) respectively designated for directional wireless communication links 240-a and 240-b may be assigned respective start times and Receive time. If the start time specified in the window parameter A_5 is before the start specified in the window parameter B_5, the end time specified in the window parameter A_5 may also occur before the start time of B_5. Therefore, no overlap of the response window 415 will occur between A_5 and B_5.

In some examples, the access parameter 405 may also include priority information associated with the plurality of directional wireless communication links 240. The priority information may indicate a ranking of the plurality of directional wireless communication links 240. For example, the priority information may indicate that the UE 115 should first attempt to communicate via the directional wireless communication link 240-a, then, the UE 115 should communicate via the directional wireless communication link 240-b, and so on. In some examples, the priority information may include other information related to the directional wireless communication link 240. In some examples, the access parameter 405 may include a power level for transmission of RACH messages or other messages.

Returning to FIG. 3, a configuration message 320 may be sent from the target base station 210 to the serving base station 205. The serving base station 205 may then send the configuration message 320 to the UE 115. In this way, the serving base station 205 can relay messages between the UE 115 and the target base station 210 because there may not be a direct communication link between the UE 115 and the target base station 210 at this time.

Upon receiving the configuration message 320, at block 325, the UE 115 may generate a RACH message 330 based at least in part on the configuration message 320. For example, a RACH message 330 may be generated for each directional wireless communication link included in the configuration message 320 based at least in part on the access parameter 405. For example, a RACH message 330 intended to be sent on the directional wireless communication link 240-a may include a pre-order signal index or a pre-amble signal (e.g., Value A_1). The UE 115 may send a RACH message 330 on the directional wireless communication link 240-a during a transmission window 410 associated with the directional wireless communication link 240-a.

At least one RACH message 330 may be sent via a directional wireless communication link 240 included in the configuration message 320. In some examples, a RACH message 330 may be generated and sent for all directional wireless communication links 240 included in the configuration message 320.

Upon receiving the RACH message 330 from the UE 115, the target base station 210 may generate and send a response message 335. In some examples, if the RACH message 330 is received via the directional wireless communication link 240-a, the response 335 may be sent via the directional wireless communication link 240-a. In other examples, the response 335 may be sent on a communication link different from the communication link on which the RACH message 330 was received (eg, an omnidirectional communication link or other directional communication link). In other examples, the serving base station 205 or the target base station 210 may determine the proximity of the UE 115 based at least in part on the data included in the measurement report 310. At least one response 335 may be sent via the directional wireless communication link 240 included in the configuration message 320. In some examples, a response 335 may be generated and sent for all directional wireless communication links 240 for which the RACH message 330 was received. The response 335 may be configured to synchronize communication between the target base station 219 and the UE 115. The response 335 may include, for example, one or more of the following: timing alignment data, initial uplink grant, timing alignment data for downlink data arrival conditions, response preamble signal identifier, other related information Or any combination thereof.

In some examples, UE 115 may receive multiple responses 335 via multiple directional wireless communication links 240. Upon receiving multiple responses 335, at block 340, the UE 115 may decide which one or more directional wireless communication links 240 to use to communicate with the target base station 210. Once the communication link between the UE 115 and the target base station 210 has been established, the UE 115 and the target base station 210 can use the information included in the relevant response 335 (for example, for both uplink and downlink transmissions). Timing alignment data) to communicate. In some examples, when the handover procedure is successfully completed, the UE 115 may send a configuration message to the target base station 210 and / or the serving base station 205.

In some cases, the target base station 210 may decide which directional wireless communication link 240 to use to establish a communication link with the UE 115. In some examples, the target base station 210 may decide to direct the wireless communication link 240 based at least in part on PRACH data. The decision made by the target base station 210 may be made after receiving the RACH message 330 from the UE 115. In some examples, the target base station 210 may send a response message 335 on the directional wireless communication link 240 based at least in part on the decisions discussed above. For example, before sending the response message 335, the target base station 210 may decide which directional wireless communication link 240 to use, and specifically send the response message 335 on those directional wireless communication links.

FIG. 5 illustrates an example of a communication mechanism 500 of a technique for handover in the presence of a directional wireless beam. The communication mechanism 500 may be an example of the communication mechanism 300. In some examples, the communication mechanism 500 may be an extended version of the communication mechanism 300 and may contribute additional details to the communication mechanism 300.

At block 505, the UE 115 may measure the signal strength of the serving base station 205, and the UE 115 may measure the signal strength of a neighboring base station (eg, the target base station 210). The UE 115 may also compare the measured signal strength with one or more thresholds. UE 115 may determine whether one or more measurement events occur (eg, measurement events A1, A2, A3, A4, A5, A6, B1, and / or B2 based at least in part on comparing signal strength to a threshold value. ). When it is determined that a measurement event has occurred, a procedure can be initiated. For example, if measurement event B2 occurs, an inter-RAT handover procedure (for example, a handover from LTE to 3G) may be initiated. The occurrence of a measurement event or the initiation of a program caused thereby may be performed by the UE 115 or the serving base station 205.

At block 510, the UE 115 may decide one or more mobility parameters 235 of the UE 115. The mobility parameter 235 may indicate that the UE 115 is at a specific location, is traveling at a specific speed in a specific direction, other information related to the mobility of the UE 115, or any combination thereof. In some examples, mobility parameters may be included in the measurement report 310.

In some examples, the measurement report 310 may be generated based at least in part on a radio resource control (RRC) configuration message received by the UE 115 from the serving base station 205. The measurement report configuration message may include parameters related to which neighboring base stations (eg, neighboring cells) and which frequencies the UE 115 should measure, criteria for sending measurement reports, and interval for transmission of measurement reports. (I.e. measurement gap) and other related information. In some cases, the measurement report may be triggered by an event related to a channel condition of a serving base station or an adjacent base station. Upon receiving the measurement report 310 from the UE 115, the serving base station 205 may decide whether a handover is required. If the serving base station 205 decides that the handover of the UE 115 is required, the serving base station 205 may send the measurement report 310 to the target base station 210 selected from the plurality of neighboring base stations. In some examples, the measurement report 310 sent to the target base station 210 is different from the measurement report 310 received from the UE 115.

The measured signal strength, a comparison result with a threshold value, a decision on the occurrence of time, an action parameter 235, or any combination thereof may be included in the measurement report 310. Blocks 505 and 510 may be sub-steps or examples of block 305 described with reference to FIG. 3. Accordingly, blocks 505 and 510 may be similarly embodied as block 305 and may include some or all of the functions described with respect to block 305.

A configuration message 310 may be sent by the UE 115 to the serving base station 205. In some examples, the serving base station 205 may relay the measurement report 310 to the target base station 210. In other examples, if the serving base station 205 decides that a handover procedure should be initiated (eg, an intra-RAT handover procedure), the serving base station 205 can then select the target base station 210 from a variety of neighboring base stations for the handover procedure . In some examples, the target base station 210 may be selected based at least in part on the location of the UE 115, the mobility parameter 235 of the UE 115, or other related information related to the UE 115. Once the serving base station 205 has selected the target base station 210, the serving base station 205 can send the measurement report 310 to the target base station 210. In some examples, the UE 115 may select a target base station 210. In some examples, the serving base station 205 may change or modify the measurement report before sending the measurement report 310 to the target base station 210.

Upon receiving the measurement report 310, the target base station 210 may determine whether the configuration message 320 may include multiple directional wireless communication links 240. In some examples, the serving base station 205 may decide whether the configuration message 320 may include a plurality of directional wireless communication links 240.

In block 515, the target base station 210 may select a plurality of directional wireless communication links 240 for inclusion in the configuration message 320. The plurality of directional wireless communication links 240 may be selected from a larger set of directional wireless communication links 240 associated with the target base station 210. In some examples, selecting the plurality of directional wireless communication links 240 may be based at least in part on the following: network delay, network traffic, mobility parameters of the UE 115, availability of communication resources, or any combination thereof . In some examples, the plurality of directional wireless communication links 240 may be selected based at least in part on the information included in the measurement report 310. In some examples, the target base station 210 may initiate one or more measurements, messages, or other methods to collect additional information about the location and mobility of the UE 115. The plurality of directional wireless communication links 240 may be selected based at least in part on the information included in the measurement report 310 and additional information directly collected by the target base station 210. In some examples, the target base station 210 may select the directional wireless communication link 240 based at least in part on a distance from the UE 115 to the target base station 210 or an angle from the UE 115 to the target base station 210. In some examples, the selected directional wireless communication link 240 may have different beam widths 245. In some examples, the beamwidth of the directional wireless communication link 240 included in the configuration message 320 is compared to the beamwidth of a typical directional beam used to transfer messages between the target base station 210 and the connected UE 115 245 can be wider.

In block 520, the target base station 210 may determine access parameters for the directional wireless communication link 240 for each of the plurality of directional wireless communication links. Determining the access parameter 405 may include deciding which types or types of access parameters may be included in the configuration message 320 and / or deciding the value of the selected access parameter 405. In some examples, the value of the access parameter determined for each directional wireless communication link 240 may be based at least in part on the estimated delay, network traffic, UE mobility parameters, communication Availability of resources or any combination thereof. The value of the access parameter 405 for each of the configuration messages 320 may be uniquely determined for each directional wireless communication link 240 included in the configuration message 320.

Blocks 515 and 520 may be sub-steps or examples of block 315 described with reference to FIG. 3. Accordingly, blocks 515 and 520 may be similarly embodied as block 315 and may include some or all of the functions described with respect to block 315.

The configuration message 320 may be sent by the target base station 210. The serving base station 205 may relay the configuration message 320 to the UE 115.

In block 525, the UE 115 may measure the channel conditions of the plurality of directional wireless communication links 240 included in the configuration message 320. At block 530, based at least in part on the measured channel conditions, the UE 115 may decide through which directional wireless communication links 240 to send the RACH message 330 to the target base station 210. In some examples, the UE 115 generates a RACH message 330 and sends the RACH message 330 on all directional wireless communication links 240 included in the configuration message 320. In other examples, the UE 115 generates a RACH message 330 and sends the RACH message 330 on a subset of the directional wireless communication link 240 included in the configuration message 320.

In block 535, the UE 115 may decide an access parameter 405 for each directional wireless communication link 240 included in the configuration message 320. In some examples, the UE 115 may decide on access parameters for directing a selected subset of the wireless communication links 240. The access parameter 405 that can be determined by the UE 115 may include a preamble signal index, a PRACH mask index, a beam index, a transmission window, a reception window, priority information, power level, or any combination thereof.

The RACH message 330 may be sent to the target base station 210 via one or more of the directional wireless communication links 240 included in the configuration message 320. The RACH message 330 for each directional wireless communication link 240 may be sent in its associated sending window indicated in the configuration message 320.

In block 540, the UE 115 may decide a reception window for each directional wireless communication link 240 included in the configuration message 320. In some examples, the UE 115 may be able to monitor only one directional wireless beam at a time. This may be due to analog beamforming constraints. Therefore, any given receiving window may not overlap with any other receiving window. For example, the timing parameters may follow the example provided above with reference to the response window 415 of FIG. 4. In order to avoid overlap, the target base station 210 may determine the receiving window in a centralized manner.

At block 545, the UE 115 may monitor each directional wireless communication link 240 during a respective receive window of each directional wireless communication link 240. During monitoring, the UE 115 may look for a response message 335 sent by the target base station 210. The target base station 210 may generate and / or send a response message 335 based at least in part on receiving the relevant RACH message 330 from the UE 115. If the expected response message 335 is not received, the UE 115 may continue to monitor the recurrence time of the transmission window. In some examples, the target base station 210 may reclaim the RACH resources when the handover procedure is completed, after the timer associated with each resource has expired, or in the event that both occur. For example, if the RACH message 330 is not received before the timer associated with the RACH transmission window expires, the target base station 210 may request the RACH transmission window again. In another example, the UE 115 may be static (as may be indicated by the mobility parameter 235). In such a scenario, the UE 115 may not perform RACH on all directional wireless communication links 240 included in the configuration message 320. Therefore, the target base station 210 may request the unused RACH resources again after a certain amount of time has expired.

Blocks 525, 530, 535, 540, and 545 may be sub-steps or examples of block 325 described with reference to FIG. Accordingly, blocks 525, 530, 535, 540, and 545 may be similarly embodied as block 325 and may include some or all of the functions described with respect to block 325.

In some examples, the UE 115 may receive one or more responses 335 via one or more directional wireless communication links 240. Upon receiving one or more responses 335, at block 340 of FIG. 5, the UE 115 may decide which one or more directional wireless communication links 240 to use to communicate with the target base station 210. Once the communication link between the UE 115 and the target base station 210 has been established, the UE 115 and the target base station 210 can use the information included in the relevant response 335 (for example, for both uplink and downlink transmissions). Timing data) for communication.

In some cases, the target base station 210 may decide which directional wireless communication link 240 to use to establish a communication link with the UE 115. In some examples, the target base station 210 may decide to direct the wireless communication link 240 based at least in part on PRACH data. The decision made by the target base station 210 may be made after receiving the RACH message 330 (see FIG. 5) from the UE 115. In some examples, the target base station 210 may send a response message 335 on the directional wireless communication link 240 based at least in part on the decisions discussed above. For example, before sending a response message 335 (see FIG. 5), the target base station 210 may decide which directional wireless communication link 240 to use, and specifically send a response message 335 on those directional wireless communication links.

FIG. 6 illustrates a block diagram 600 of a wireless device 605 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The wireless device 605 may be an example of various aspects of the base stations 105, 205, 210 as described with reference to FIGS. 1-3 and 5. In some examples, the wireless device may be a target base station. The wireless device 605 may include a receiver 610, a base station switching manager 615, and a transmitter 620. The wireless device 605 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

The receiver 610 may receive, for example, packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to technologies used for handover in the presence of directional wireless beams, etc.) Information. Information can be passed to other components of the device. The receiver 610 may be an example of various aspects of the transceiver 935 described with reference to FIG. 9.

The base station switching manager 615 may be an example of various aspects of the base station switching manager 915 described with reference to FIG. 9.

The base station handover manager 615 may receive a measurement report, generate a first message based on the measurement report, and send the first message to the UE via the serving base station. The first message includes an orientation for the UE and the target base station. Each set of wireless communication links directs access parameters of the wireless communication link.

The transmitter 620 may send signals generated by other components of the device. In some examples, the transmitter 620 may be co-located with the receiver 610 in a transceiver module. For example, the transmitter 620 may be an example of various aspects of the transceiver 935 described with reference to FIG. 9. The transmitter 620 may include a single antenna, or the transceiver 620 may include a set of antennas.

FIG. 7 illustrates a block diagram 700 of a wireless device 705 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The wireless device 705 may be an example of various aspects of the wireless device 605 or the base stations 105, 205, 210 as described with reference to FIGS. 1-3 and 5-6. The wireless device 705 may include a receiver 710, a base station switching manager 715, and a transmitter 720. The wireless device 705 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

The receiver 710 may receive, for example, packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to technologies used for handover in the presence of directional wireless beams, etc.) Information. Information can be passed to other components of the device. The receiver 710 may be an example of various aspects of the transceiver 935 described with reference to FIG. 9.

The base station switching manager 715 may be an example of various aspects of the base station switching manager 915 described with reference to FIG. 9. The base station switching manager 715 may also include a communication manager 725 and a message manager 730.

The communication manager 725 may receive the measurement report, send the first message to the UE via the serving base station, and use at least one of the directional wireless communication links included in the first message to establish a communication link with the UE. In some cases, the communication manager 725 may receive the second message from the UE via one of the directional wireless communication links included in the first message based on the access parameter included in the first message, And sending a response to the second message via the one directional wireless communication link among the directional wireless communication links included in the first message. In some cases, the communication manager 725 may receive the second message via each of the directional wireless communication links included in the first message, and via the directional wireless communication link included in the first message. Each of the roads sends a response to the wireless communication link. In some cases, the measurement report and the first message are relayed by the serving base station between the UE and the target base station.

The message manager 730 may generate a first message based on the measurement report via the target base station, and the first message includes storage of the directional wireless communication link for each set of directional wireless communication links between the UE and the target base station. Take parameters. In some cases, the second message is a RACH message.

The transmitter 720 may send signals generated by other components of the device. In some examples, the transmitter 720 may be co-located with the receiver 710 in a transceiver module. For example, the transmitter 720 may be an example of various aspects of the transceiver 935 described with reference to FIG. 9. The transmitter 720 may include a single antenna, or the transceiver 720 may include a set of antennas.

8 illustrates a block diagram 800 of a base station handover manager 815 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The base station switching manager 815 may be an example of various aspects of the base station switching manager 615, the base station switching manager 715, or the base station switching manager 915 described with reference to FIGS. 6, 7, and 9. The base station switching manager 815 may include a communication manager 820, a message manager 825, a directional beam manager 830, and an access parameter manager 835. Each of these modules can communicate with each other directly or indirectly (eg, via one or more buses).

The communication manager 820 may receive the measurement report, send the first message to the UE via the serving base station, and use at least one of the directional wireless communication links included in the first message to establish a communication link with the UE. In some cases, the communication manager 820 may receive the second message from the UE via one of the directional wireless communication links included in the first message based on the access parameter included in the first message, And sending a response to the second message via the one directional wireless communication link among the directional wireless communication links included in the first message. In some cases, the communication manager 820 may receive the second message via each of the directional wireless communication links included in the first message, and via the directional wireless communication link included in the first message. Each of the roads sends a response to the wireless communication link. In some cases, the measurement report and the first message are relayed by the serving base station between the UE and the target base station.

The message manager 825 may generate a first message based on the measurement report via the target base station. The first message includes storage of the directional wireless communication link for each set of the directional wireless communication link between the UE and the target base station. Take parameters. In some cases, the second message is a RACH message.

The directional beam manager 830 may select a directional wireless communication link set from a total number of directional wireless communication links associated with the target base station to include in the first message. In some cases, the set of directional wireless communication links is a mmW communication link.

The access parameter manager 835 may decide the value of the access parameter for each directional wireless communication link based on the following items: estimated delay, network traffic, UE mobility parameters, availability of communication resources, or Its combination. In some cases, the access parameters include a preamble signal index, a PRACH mask index, or a beam index for each directional wireless communication link included in the first message. In some cases, the access parameter includes a response window for each directional wireless communication link included in the first message, and the response window includes a UE for monitoring the directional wireless communication link associated with the response window. Start time and duration. In some cases, the response windows associated with one of the directional wireless communication links do not overlap with the response windows associated with other directional wireless communication links. In some cases, the access parameter includes a transmission window for each directional wireless communication link included in the first message, the transmission window indicating a specific directional wireless communication via the directional wireless communication link set A dedicated time period for the link to receive the second message from the UE. In some cases, the access parameters include priority information associated with the directional wireless communication link set, and the priority information indicates a ranking of the directional wireless communication link set.

FIG. 9 illustrates a block diagram of a system 900 including a device 905 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The device 905 may be an example or a component of the following items: the wireless device 605, the wireless device 705, or the base stations 105, 205, and 210 as described above (for example, refer to FIGS. 1-3 and 5-7). In some examples, the wireless device 905 may be a target base station. Device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, including: base station switching manager 915, processor 920, memory 925, software 930, transceiver 935, antenna 940, network communication manager 945, and base station communication manager 950. These components can communicate electronically via one or more buses (eg, bus 910). The device 905 may communicate wirelessly with one or more UEs 115.

The base station switching manager 915 may be an example of various aspects of the base station switching manager 615, the base station switching manager 715, or the base station switching manager 815 described with reference to FIGS. 6, 7, and 8. The base station handover manager 915 may receive a measurement report, generate a first message based on the measurement report, and send the first message to the UE via the serving base station. The first message includes an orientation for the UE and the target base station. Each set of wireless communication links directs access parameters of the wireless communication link.

The processor 920 may include smart software devices (eg, a general-purpose processor, a digital signal processor (DSP), a central processing unit (CPU), a microcontroller, a special application integrated circuit (ASIC), a field programmable gate array ( FPGA), programmable logic devices, individual gate or transistor logic components, individual hardware components, or any combination thereof). In some cases, the processor 920 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 920. The processor 920 may be configured to execute computer-readable instructions stored in memory to perform various functions (for example, functions or tasks to support handover in the presence of a directional wireless beam).

The memory 925 may include a random access memory (RAM) and a read-only memory (ROM). The memory 925 may store computer-readable, computer-executable software 930 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, in addition, the memory 925 may include a basic input / output system (BIOS), which may control basic hardware and / or software operations (eg, interaction with peripheral components or devices).

The software 930 may include code for implementing various aspects of the content of the present case, which includes code for supporting a technique for handover in the presence of a directional wireless beam. The software 930 may be stored in non-transitory computer-readable media (eg, system memory or other memory). In some cases, the software 930 may not be directly executable by a processor, but may cause a computer (eg, when compiled and executed) to perform the functions described herein.

The transceiver 935 may communicate bi-directionally via one or more antennas, wired or wireless links as previously described. For example, the transceiver 935 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 935 may also include a modem for modulating the packets and providing the modulated packets to the antenna for transmission, and demodulating the packets received from the antenna.

In some cases, the wireless device may include a single antenna 940. However, in some cases, the device may have more than one antenna 940 that is capable of sending or receiving multiple wireless transmissions simultaneously.

The network communication manager 945 may manage communication with the core network (eg, via one or more wired backhaul links). For example, the network communication manager 945 may manage the transmission of data communications for client devices (eg, one or more UEs 115).

The base station communication manager 950 may manage communication with other base stations 105 and may include a controller or scheduler for controlling communication with the UE 115 in coordination with the other base stations 105. For example, the base station communication manager 950 may coordinate the scheduling for transmissions to the UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the base station communication manager 950 may provide an X2 interface within the Long Term Evolution (LTE) / LTE-A wireless communication network technology to provide communication between the base stations 105.

FIG. 10 illustrates a block diagram 1000 of a wireless device 1005 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The wireless device 1005 may be an example of various aspects of the UE 115 as described with reference to FIGS. 1 and 2. The wireless device 1005 may include a receiver 1010, a UE handover manager 1015, and a transmitter 1020. The wireless device 1005 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

The receiver 1010 may receive, for example, packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to technologies used for handover in the presence of directional wireless beams, etc.) Information. Information can be passed to other components of the device. The receiver 1010 may be an example of various aspects of the transceiver 1335 described with reference to FIG. 13.

The UE handover manager 1015 may be an example of various aspects of the UE handover manager 1315 described with reference to FIG. 13.

The UE handover manager 1015 may: send a measurement report; receive a first message at the UE, the first message including a directional wireless communication link for each of a set of directional wireless communication links between the UE and the target base station; The access parameter, the first message is based on the measurement report; and based on the access parameter included in the first message, the second message is sent via at least one of the directional wireless communication links.

The transmitter 1020 may send signals generated by other components of the device. In some examples, the transmitter 1020 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1020 may be an example of various aspects of the transceiver 1335 described with reference to FIG. 13. The transmitter 1020 may include a single antenna, or the transceiver 1020 may include a set of antennas.

FIG. 11 illustrates a block diagram 1100 of a wireless device 1105 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The wireless device 1105 may be an example of various aspects of the wireless device 1005 or the UE 115 as described with reference to FIGS. 1, 2, and 10. The wireless device 1105 may include a receiver 1110, a UE handover manager 1115, and a transmitter 1120. The wireless device 1105 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

The receiver 1110 may receive, for example, packets, user data, or control information associated with various information channels (eg, control channels, data channels, and information related to technologies used for handover in the presence of directional wireless beams, etc.) Information. Information can be passed to other components of the device. The receiver 1110 may be an example of various aspects of the transceiver 1335 described with reference to FIG. 13.

The UE handover manager 1115 may be an example of various aspects of the UE handover manager 1315 described with reference to FIG. 13. The UE handover manager 1115 may also include a measurement report manager 1125 and a message manager 1130.

The measurement report manager 1125 may send a measurement report to measure the first signal strength of the serving base station and the second signal strength of the target base station. In some cases, the measurement report manager 1125 may generate a measurement report based on the first signal strength and the second signal strength, and may generate a measurement report including a mobility state of the UE.

The message manager 1130 may receive a first message at the UE. The first message includes access parameters for the directional wireless communication link for each of the set of directional wireless communication links between the UE and the target base station. The first message It is based on the measurement report. The message manager 1130 may send the second message via at least one of the directional wireless communication links based on the access parameter included in the first message. In some cases, the second message is a RACH message.

The transmitter 1120 may send signals generated by other components of the device. In some examples, the transmitter 1120 may be co-located with the receiver 1110 in a transceiver module. For example, the transmitter 1120 may be an example of various aspects of the transceiver 1335 described with reference to FIG. 13. The transmitter 1120 may include a single antenna, or the transceiver 1120 may include a set of antennas.

12 illustrates a block diagram 1200 of a UE handover manager 1215 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The UE handover manager 1215 may be an example of various aspects of the UE handover manager 1315 described with reference to FIGS. 10, 11, and 13. The UE handover manager 1215 may include a measurement report manager 1220, a message manager 1225, a window manager 1230, a communication manager 1235, a directional beam manager 1240, and a mobility manager 1245. Each of these modules can communicate with each other directly or indirectly (eg, via one or more buses).

The measurement report manager 1220 may send a measurement report to measure the first signal strength of the serving base station and the second signal strength of the target base station. In some cases, the measurement report manager 1220 may generate a measurement report based on the first signal strength and the second signal strength, and may generate a measurement report including the mobility status of the UE.

The message manager 1225 may receive a first message at the UE. The first message includes access parameters for the directional wireless communication link for each set of directional wireless communication links between the UE and the target base station. It is based on the measurement report. The message manager 1225 may send the second message via at least one of the directional wireless communication links based on the access parameter included in the first message. In some cases, the second message is a RACH message.

The window manager 1230 may determine a response window for each directional wireless communication link based on the access parameters included in the first message, and monitor the selection for the response to the second message during the response window Directional wireless communication link, the response window is associated with the selected directional wireless communication link. In some cases, the response window associated with one of the directional wireless communication links does not overlap with the response window associated with any other directional wireless communication link.

The communication manager 1235 may receive a response to the second message via the selected directional wireless communication link during a response window associated with the selected directional wireless communication link in the directional wireless communication link set.

The directional beam manager 1240 may select one or more directional wireless communication links in the set of directional wireless communication links based on the channel conditions of the directional wireless communication links measured by the UE.

The mobility manager 1245 may determine the mobility status of the UE.

FIG. 13 illustrates a diagram of a system 1300 including a device 1305 supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The device 1305 may be an example of or include components of the UE 115 (eg, with reference to FIGS. 1 and 2) as previously described. The device 1305 may include components for two-way voice and data communications, including components for sending and receiving communications, including: UE switch manager 1315, processor 1320, memory 1325, software 1330, transceiver 1335, antenna 1340 And I / O controller 1345. These components can communicate electronically via one or more buses (eg, bus 1310). The device 1305 may communicate wirelessly with one or more base stations 105.

Processor 1320 may include smart software devices (eg, general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, individual gate or transistor logic components, individual hardware components, or any combination thereof) . In some cases, the processor 1320 may be configured to use a memory controller to operate the memory array. In other cases, the memory controller may be integrated into the processor 1320. The processor 1320 may be configured to execute computer-readable instructions stored in a memory to perform various functions (for example, a function or task supporting a handover in the presence of a directional wireless beam).

The memory 1325 may include a RAM and a ROM. The memory 1325 may store computer-readable, computer-executable software 1330 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, in addition, the memory 1325 may also include a BIOS, which may control basic hardware and / or software operations (eg, interaction with peripheral components or devices).

The software 1330 may include code for implementing various aspects of the content of the present case, which includes code for supporting a technique for handover in the presence of a directional wireless beam. The software 1330 may be stored in non-transitory computer-readable media (for example, system memory or other memory). In some cases, software 1330 may not be directly executable by the processor, but may cause a computer (eg, when compiled and executed) to perform the functions described herein.

The transceiver 1335 may communicate bi-directionally via one or more antennas, wired or wireless links as previously described. For example, the transceiver 1335 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1335 may also include a modem for modulating the packets and providing the modulated packets to the antenna for transmission, and demodulating the packets received from the antenna.

In some cases, the wireless device may include a single antenna 1340. However, in some cases, the device may have more than one antenna 1340, which is capable of sending or receiving multiple wireless transmissions simultaneously.

The I / O controller 1345 can manage input and output signals to the device 1305. The I / O controller 1345 can also manage peripheral devices that are not integrated into the device 1305. In some cases, the I / O controller 1345 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1345 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known System.

FIG. 14 illustrates a flowchart of a method 1400 of a technique for handover in the presence of a directional wireless beam, in accordance with various aspects of the present disclosure. The operations of method 1400 may be implemented by target base station 105 or its components as described herein. For example, the operations of method 1400 may be performed by a base station handover manager as described with reference to FIGS. 6-9. In some examples, the base station 105 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

At block 1405, the target base station 105 may receive a measurement report. The operations at block 1405 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1405 may be performed by the communications manager described with reference to FIGS. 6-9.

At block 1410, the target base station 105 may generate a first message based at least in part on the measurement report, the first message including a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station Access parameters of the communication link. The operations of block 1410 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1410 may be performed by the message manager described with reference to FIGS. 6-9.

At block 1415, the target base station 105 may send the first message to the UE via the serving base station. The operations of block 1415 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1415 may be performed by the communication manager described with reference to FIGS. 6-9.

FIG. 15 illustrates a flowchart of a method 1500 of a technique for handover in the presence of a directional wireless beam according to various aspects of the present disclosure. The operations of method 1500 may be implemented by target base station 105 or its components as described herein. For example, the operations of method 1500 may be performed by a base station handover manager as described with reference to FIGS. 6 to 9. In some examples, the base station 105 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

At block 1505, the target base station 105 may receive a measurement report. The operations of block 1505 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1505 may be performed by a communications manager as described with reference to FIGS. 6-9.

At block 1510, the target base station 105 may generate a first message based at least in part on the measurement report, the first message including a directional wireless communication link for each of the plurality of directional wireless communication links between the UE and the target base station. Access parameters of the communication link. The operations of block 1510 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1510 may be performed by a message manager as described with reference to FIGS. 6-9.

At block 1515, the target base station 105 may send the first message to the UE via the serving base station. The operations of block 1515 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1515 may be performed by a communications manager as described with reference to FIGS. 6-9.

At block 1520, the target base station 105 may select a plurality of directional wireless communication links from the total number of directional wireless communication links associated with the target base station to include in the first message. The operations of block 1520 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1520 may be performed by a directional beam manager as described with reference to FIGS. 6-9.

At block 1525, the target base station 105 may determine the value of the access parameter for each directional wireless communication link. In some examples, the target base station 105 may determine the values of the access parameters based at least in part on the estimated delay, network traffic, UE mobility parameters, availability of communication resources, or a combination thereof. The operations of block 1525 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1525 may be performed by an access parameter manager as described with reference to FIGS. 6-9.

FIG. 16 illustrates a flowchart of a method 1600 of a technique for handover in the presence of a directional wireless beam according to various aspects of the present disclosure. The operations of method 1600 may be implemented by UE 115 or its components as described herein. For example, the operations of method 1600 may be performed by a UE handover manager as described with reference to FIGS. 10 to 13. In some examples, the UE 115 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

At block 1605, the UE 115 may send a measurement report. The operations of block 1605 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1605 may be performed by a measurement report manager as described with reference to FIGS. 10-13.

At block 1610, the UE 115 may receive a first message at the UE, the first message including access parameters for the directional wireless communication link for each of the plurality of directional wireless communication links between the UE and the target base station. The first message is based at least in part on the measurement report. The operations of block 1610 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1610 may be performed by a message manager as described with reference to FIGS. 10-13.

At block 1615, the UE 115 may send the second message via at least one of the directional wireless communication links based at least in part on the access parameters included in the first message. The operations of block 1615 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1615 may be performed by a message manager as described with reference to FIGS. 10-13.

FIG. 17 illustrates a flowchart of a method 1700 of a technique for handover in the presence of a directional wireless beam according to various aspects of the content of the present case. The operations of method 1700 may be implemented by UE 115 or its components as described herein. For example, the operations of method 1700 may be performed by a UE handover manager as described with reference to FIGS. 10 to 13. In some examples, the UE 115 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

At block 1705, the UE 115 may send a measurement report. The operations of block 1705 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operation of block 1705 may be performed by a measurement report manager as described with reference to FIGS. 10-13.

At block 1710, the UE 115 may receive a first message at the UE, the first message including an access parameter for each of the plurality of directional wireless communication links between the UE and the target base station. The first message is based at least in part on the measurement report. The operations of block 1710 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1710 may be performed by a message manager as described with reference to FIGS. 10-13.

At block 1715, the UE 115 may send the second message via at least one of the directional wireless communication links based at least in part on the access parameters included in the first message. The operations of block 1715 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1715 may be performed by a message manager as described with reference to FIGS. 10-13.

At block 1720, the UE 115 may decide a response window for each directional wireless communication link. In some examples, the UE 115 may decide a response window based at least in part on the access parameters included in the first message. The operations of block 1720 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1720 may be performed by a window manager as described with reference to FIGS. 10-13.

At block 1725, the UE 115 may monitor the selected directional wireless communication link for the response to the second message during the response window, and the response window is associated with the selected directional wireless communication link. The operations of block 1725 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operation of block 1725 may be performed by a window manager as described with reference to FIGS. 10-13.

At block 1730, the UE 115 may receive the pair via the at least one selected directional wireless communication link during a response window associated with the at least one selected directional wireless communication link. At least one response to the second message. The operations of block 1730 may be performed according to the methods described with reference to FIGS. 1 to 5. In some examples, aspects of the operations of block 1730 may be performed by a communications manager as described with reference to FIGS. 10-13.

It should be noted that the above methods describe possible implementations, operations and steps may be rearranged or otherwise modified, and other implementations are possible. In addition, aspects from two or more of these methods may be combined.

The techniques described in this article can be used in various wireless communication systems, such as code division multiplexing access (CDMA), time division multiplexing access (TDMA), frequency division multiplexing access (FDMA), orthogonal frequency division multiplexing Access (OFDMA), single-carrier frequency division multiplexed access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A code division multiple access (CDMA) system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version can usually be called CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is often called CDMA2000 1xEV-DO, High-Speed Packet Data (HRPD), and so on. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. Time division multiple access (TDMA) systems enable radio technologies such as the Global System for Mobile Communications (GSM).

Orthogonal Frequency Division Multiplex Access (OFDMA) systems can implement radio technologies such as: Ultra Mobile Broadband (UMB), Evolutionary UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi- Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and Improved LTE (LTE-A) are versions of Universal Mobile Telecommunications System (UMTS) using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and the Global System for Mobile Communications (GSM) are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. Although aspects of the LTE system may be described for the purpose of examples, and LTE terminology may be used in most of the descriptions, the techniques described herein may be applicable to situations other than LTE applications.

In LTE / LTE-A networks (including such networks described herein), the term evolutionary Node B (eNB) can often be used to describe a base station. The wireless communication system or multiple wireless communication systems described herein may include a heterogeneous LTE / LTE-A network in which different types of eNBs provide coverage for each geographic area. For example, each eNB or base station can provide communication coverage for macro cells, small cells, or other types of cells. Depending on the context, the term "cell" may be used to describe a base station, a carrier or component carrier associated with the base station, or a coverage area (eg, sector, etc.) of a carrier or base station.

The base station may include or may be referred to by persons with ordinary knowledge in the field to which the present invention pertains to base station transceivers, radio base stations, access points, radio transceivers, Node B, eNB, Home Node B, Home Evolution Node B, Some other suitable term. The geographic coverage area of the base station can be divided into sectors that constitute only a part of the coverage area. The wireless communication system or multiple wireless communication systems described herein may include different types of base stations (eg, macro cell base stations or small cell base stations). The UE described herein can communicate with various types of base stations and network equipment (including macro eNBs, small cell eNBs, relay base stations, etc.). There may be overlapping geographic coverage areas for different technologies.

Macrocells typically cover a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by a UE with a subscription to the service of a network provider. Small cells are lower power base stations that can operate in the same or different (eg, licensed, unlicensed, etc.) frequency bands as macro cells compared to macro cells. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a small geographic area and may allow unrestricted access by a UE having a subscription with a service of a network provider. A femtocell can also cover a small geographic area (for example, a home), and can provide UEs associated with the femtocell (for example, UEs in a closed user group (CSG), UEs for users in the home, etc. ) Restricted access. An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. The eNB may support one or more (eg, two, three, four, etc.) cells (eg, component carriers). The UE can communicate with various types of base stations and network equipment (including macro eNBs, small cell eNBs, relay base stations, etc.).

The wireless communication system or multiple wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations can have similar frame timing, and transmissions from different base stations can be approximately aligned in time. For asynchronous operation, the base stations can have different frame timings, and transmissions from different base stations can be misaligned in time. The techniques described herein can be used for synchronous or asynchronous operations.

The downlink transmissions described herein may also be referred to as forward link transmissions, and the uplink transmissions may also be referred to as reverse link transmissions. Each communication link described herein (eg, including the wireless communication system 100 in FIGS. 1 and 2). One or more carriers may be included, where each carrier may be a signal composed of multiple sub-carriers (eg, waveform signals of different frequencies).

This document describes the example configuration in conjunction with the detailed description set forth in the drawings, and does not mean that all examples can be implemented or are within the scope of the request. The term "exemplary" as used herein means "serving as an example, instance, or illustration" rather than "preferred" or "advantageous over other examples." To provide an understanding of the described technology, the detailed description includes specific details. However, these techniques can be implemented without these specific details. In some instances, to avoid obscuring the concept of the described examples, well-known structures and devices are illustrated in block diagram form.

In the drawings, similar components or features may have the same element symbols. In addition, individual components of the same type can be distinguished by a dash followed by a component symbol and a second mark that distinguishes between similar components. If only the first element symbol is used in the specification, the description applies to any one of similar components having the same first element symbol, regardless of the second element symbol.

The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, the materials, instructions, commands, information, signals, bits, symbols and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

A general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, individual gate or transistor logic, individual hardware components, or any combination thereof, designed to perform the functions described herein may be implemented or performed in conjunction with this article The descriptions are described in various illustrative blocks and modules. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (eg, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented by software executed by a processor, these functions can be stored on a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of this case and the appended claims. For example, due to the nature of software, software, hardware, firmware, hard-wired, or any combination of these items executed by a processor may be used to implement the above functions. Features that implement functions may also be physically located at various locations, including portions that are distributed such that functions are implemented at different physical locations. In addition, as used herein (included in a request), "or" as used in a list of items (eg, in terms such as "at least one of" or "one or more of" A list of items ending with a phrase such as) indicates an inclusive list such that a list such as at least one of A, B, or C means A, or B, or C, or AB, or AC, or BC, or ABC ( That is, A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, without departing from the scope of the content of this case, exemplary steps described as "based on condition A" may be based on both condition A and condition B. In other words, as used herein, the phrase "based on" should be interpreted in a similar manner as the phrase "based at least in part on."

Computer-readable media includes both non-transitory computer storage media and communication media. Communication media includes any medium that facilitates the transfer of computer programs from one place to another. Non-transitory storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electronically erasable and programmable read-only memory (EEPROM), compact disc (CD) ROM or other optical disk storage, magnetic disks Storage or other magnetic storage device, or any other non-transitory medium that can be used to carry or store a desired code unit in the form of an instruction or data structure and can be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if you use coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared, radio, and microwave) to reflect software from websites, servers, or other remote sources, coaxial cables, Fiber optic cables, twisted pair, DSL, or wireless technologies (eg, infrared, radio, and microwave) are included in the definition of media. As used herein, disks and discs include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy discs, and Blu-ray discs, where magnetic discs typically copy data magnetically, and optical discs Lasers are used to reproduce data optically. The combination of the above items is also included in the scope of computer-readable media.

In order to enable those having ordinary knowledge in the field to which the present invention can implement or use the content of the present case, the description herein is provided. For those having ordinary knowledge in the field to which the present invention pertains, various modifications to the content of the present case will be readily apparent, and the overall principles defined herein may be applied to other variations without departing from the scope of the present content. Therefore, the content of this case is not limited to the examples and designs described herein, but is given the broadest scope consistent with the principles and novel features disclosed herein.

100‧‧‧Wireless communication system

105‧‧‧Base Station

110‧‧‧ Covered Area

115‧‧‧UE

125‧‧‧ communication link

130‧‧‧ Core Network

132‧‧‧Reload Link

134‧‧‧Reload Link

200‧‧‧Wireless communication system

205‧‧‧Service Base Station

210‧‧‧Target base station

215‧‧‧ Covered Area

220‧‧‧ Covered Area

225‧‧‧Reload Link

230‧‧‧Reload Link

235‧‧‧Action parameters

240‧‧‧Wireless communication link

240-a‧‧‧Wireless communication link

240-b‧‧‧Wireless communication link

240-c‧‧‧Wireless communication link

240-N‧‧‧Wireless communication link

245‧‧‧Beam width

245-a‧‧‧Beamwidth

245-b‧‧‧Beamwidth

245-c‧‧‧Beam width

245-N‧‧‧Beamwidth

300‧‧‧Communication mechanism

305‧‧‧box

310‧‧‧ Measurement Report

315‧‧‧block

320‧‧‧Configuration Information

325‧‧‧box

330‧‧‧RACH Message

335‧‧‧Response message

340‧‧‧box

400‧‧‧Form

405‧‧‧Access parameter

405-a‧‧‧Access parameter

405-b‧‧‧Access parameter

405-N‧‧‧Access parameter

410‧‧‧Send window

415‧‧‧ Response window

500‧‧‧ communication mechanism

505‧‧‧box

510‧‧‧box

515‧‧‧box

520‧‧‧box

525‧‧‧box

530‧‧‧box

535‧‧‧box

540‧‧‧box

545‧‧‧box

600‧‧‧block diagram

605‧‧‧Wireless equipment

610‧‧‧ Receiver

615‧‧‧Base Station Switch Manager

620‧‧‧ launcher

700‧‧‧block diagram

705‧‧‧Wireless device

710‧‧‧ Receiver

715‧‧‧Base Station Switch Manager

720‧‧‧ launcher

725‧‧‧Communication Manager

730‧‧‧Message Manager

800‧‧‧block diagram

815‧‧‧Base Station Switch Manager

820‧‧‧Communication Manager

825‧‧‧Message Manager

830‧‧‧directional beam manager

835‧‧‧Access parameter manager

900‧‧‧ system

905‧‧‧Equipment

910‧‧‧Bus

915‧‧‧Base Station Switch Manager

920‧‧‧ processor

925‧‧‧Memory

930‧‧‧Software

935‧‧‧ Transceiver

940‧‧‧antenna

945‧‧‧Network Communication Manager

950‧‧‧Base Station Communication Manager

1000‧‧‧block diagram

1005‧‧‧Wireless device

1010‧‧‧ Receiver

1015‧‧‧UE Switch Manager

1020‧‧‧ Launcher

1100‧‧‧block diagram

1105‧‧‧Wireless Device

1110‧‧‧ Receiver

1115‧‧‧UE Switch Manager

1120‧‧‧ launcher

1125‧‧‧Measurement Report Manager

1130‧‧‧ and Message Manager

1200‧‧‧block diagram

1215‧‧‧UE Switch Manager

1220‧‧‧ Measurement Report Manager

1225‧‧‧Message Manager

1230‧‧‧Window Manager

1235‧‧‧Communication Manager

1240‧‧‧ Directional Beam Manager

1245‧‧‧Mobile Manager

1300‧‧‧ system

1305‧‧‧Equipment

1310‧‧‧Bus

1315‧‧‧UE Switch Manager

1320‧‧‧Processor

1325‧‧‧Memory

1330‧‧‧Software

1335‧‧‧Transceiver

1340‧‧‧antenna

1345‧‧‧I / O controller

1400‧‧‧Method

1405‧‧‧box

1410‧‧‧box

1415‧‧‧box

1500‧‧‧Method

1505‧‧‧box

1510‧‧‧box

1515‧‧‧box

1520‧‧‧box

1525‧‧‧box

1600‧‧‧Method

1605‧‧‧box

1610‧‧‧box

1615‧‧‧box

1700‧‧‧Method

1705‧‧‧box

1710‧‧‧box

1715‧‧‧box

1720‧‧‧box

1725‧‧‧box

1730‧‧‧box

FIG. 1 illustrates an example of a system for handover of a UE from a serving base station to a target base station according to various aspects of the content of the present case, and the system supports a technique for handover in the presence of a directional wireless beam.

FIG. 2 illustrates an example of a block diagram of a wireless communication system supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present content.

FIG. 3 illustrates an example of a communication mechanism supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present content.

FIG. 4 illustrates an example of a table supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present content.

FIG. 5 illustrates an example of a communication mechanism supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present content.

6 to 8 illustrate block diagrams of a device supporting a technique for handover in the presence of a directional wireless beam according to aspects of the present disclosure.

FIG. 9 illustrates a block diagram of a system including a base station supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present disclosure.

10 to 12 illustrate block diagrams of a device supporting a technique for handover in the presence of a directional wireless beam according to various aspects of the present content.

FIG. 13 illustrates a block diagram of a system including a UE supporting a technique for handover in the presence of a directional wireless beam according to aspects of the present content.

14 to 17 illustrate methods of a technique for handover in the presence of a directional wireless beam according to various aspects of the present disclosure.

Domestic hosting information (please note in order of hosting institution, date, and number) None

Information on foreign deposits (please note in order of deposit country, institution, date, and number) None

Claims (64)

A method for handover of a user equipment (UE) from a serving base station to a target base station includes the following steps: receiving a measurement report; and based on the target base station at least partially based on the measurement report Generating a first message, the first message including an access parameter for each of a plurality of directional wireless communication links between the UE and the target base station; and a directional wireless communication link; and via the service base The station sends the first message to the UE. The method according to claim 1 further includes the following steps: selecting a plurality of directional wireless communication links to be included in the first message from a total of the directional wireless communication links associated with the target base station. The method according to claim 1 also includes the following steps: determining the values of the access parameters for each directional wireless communication link. The method according to claim 3, wherein the determined values of the access parameters are based at least in part on the estimated delay, the amount of network transmission, the UE's mobility parameters, and the communication resources. Usability or a combination of them. The method according to claim 1, further comprising the steps of: establishing a communication link with the UE by using at least one of the directional wireless communication links. The method according to claim 1, wherein the first message makes a random access channel (RACH) resource dedicated to the UE. The method according to claim 1, wherein the access parameters include a preamble signal index and a physical random access channel (PRACH) mask index for each directional wireless communication link included in the first message. Or a beam index. The method according to claim 1, wherein the access parameters include a response window for each directional wireless communication link included in the first message, the response window including the UE monitoring and the response A start time and a duration of the directional wireless communication link associated with the window. The method according to claim 8, wherein the response window associated with one or more of the directional wireless communication links does not overlap with the response windows associated with other directional wireless communication links . The method according to claim 1, wherein the access parameters include a transmission window for each directional wireless communication link included in the first message, and the transmission window indicates that the transmission window is used to pass the plurality of directional wireless communication links. A specific directional wireless communication link in the communication link receives a second message from the UE for a dedicated period of time. The method of claim 1, wherein the access parameters include priority information associated with the plurality of directional wireless communication links, the priority information indicating a ranking of the plurality of directional wireless communication links. The method according to claim 1, further comprising the following steps: based at least in part on the access parameters included in the first message, via one of the directional wireless communication links included in the first message The wireless communication link receives a second message from the UE. The method according to claim 12 further includes the following steps: sending a response to the second message via the one directional wireless communication link among the directional wireless communication links included in the first message. The method according to claim 12, wherein the second message is a random access channel (RACH) message. The method according to claim 1, further comprising the steps of: receiving a second message via the directional wireless communication link of each of the directional wireless communication links included in the first message; and via the first message Each of the directional wireless communication links included in the message sends a response to the directional wireless communication link. The method according to claim 1, wherein the measurement report and the first message are relayed by the serving base station between the UE and the target base station. The method according to claim 1, wherein the plurality of directional wireless communication links are millimeter wave (mmW) communication links. A method for a user equipment (UE) handover from a serving base station to a target base station includes the following steps: sending a measurement report; receiving a first message at the UE, the first message Including access parameters for a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station, the first message is based at least in part on the measurement report; and Based at least in part on the access parameters included in the first message, sending a second message via at least one of the directional wireless communication links. The method according to claim 18 also includes the following steps: determining a response window for each directional wireless communication link. The method of claim 19, wherein the decision on the response window for each directional wireless communication link is based at least in part on the access parameters included in the first message. The method according to claim 19, further comprising the following steps: monitoring a selected directional wireless communication link for the response to the second message during the response window, the response window and the selected directional wireless communication link Associated. The method of claim 19, wherein the response window associated with one or more of the directional wireless communication links is not associated with any other directional wireless of the directional wireless communication links. The response window associated with the communication link overlaps. The method according to claim 18, further comprising the following steps: during a response window associated with at least one selected directional wireless communication link of the plurality of directional wireless communication links, via the at least one selected directional wireless A communication link to receive at least one response to the second message. The method according to claim 18, further comprising the steps of: measuring a first signal strength of the serving base station and a second signal strength of the target base station; and based at least in part on the first signal strength and the second signal strength Signal strength to generate this measurement report. The method according to claim 18, wherein the first message makes a random access channel (RACH) resource dedicated to the UE. The method according to claim 18 further includes the following steps: selecting one or more directional wireless communication links among the plurality of directional wireless communication links. A method according to claim 26, wherein the selection of one or more directional wireless communication links is based at least in part on priority information. The method of claim 26, wherein the selection of one or more directional wireless communication links is based at least in part on channel conditions of the one or more directional wireless communication links measured by the UE. The method according to claim 18 also includes the following steps: determining a mobility state of the UE; and generating the measurement report including the mobility state of the UE. The method according to claim 18, wherein the second message is a random access channel (RACH) message. An apparatus for switching a user equipment (UE) from a serving base station to a target base station in a system includes: a processor; a memory that performs electronic communication with the processor; and Instructions, which are stored in the memory and are operable to cause the device to perform the following operations when executed by the processor: receiving a measurement report; via the target base station based at least in part on the measurement report Generating a first message including access parameters for a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station; and via the serving base station Sending the first message to the UE. The apparatus according to claim 31, wherein the instructions are also executable by the processor to cause the apparatus to perform the following operations: select the plurality of orientations from a total number of directional wireless communication links associated with the target base station A wireless communication link is included in the first message. The device according to claim 31, wherein the instructions are also executable by the processor to cause the device to: determine the values of the access parameters for each directional wireless communication link. The device according to claim 33, wherein the determined values of the access parameters are based at least in part on the estimated delay, network transmission volume, mobility parameters of the UE, and communication resources Usability or a combination of them. The device according to claim 31, wherein the instructions are also executable by the processor to cause the device to perform the following operations: use at least one of the directional wireless communication links to establish a communication with the UE link. The apparatus according to claim 31, wherein the first message makes a random access channel (RACH) resource dedicated to the UE. The apparatus according to claim 31, wherein the access parameters include a preamble signal index and a physical random access channel (PRACH) mask index for each directional wireless communication link included in the first message Or a beam index. The device according to claim 31, wherein the access parameters include a response window for each directional wireless communication link included in the first message, the response window including the UE monitoring and the response A start time and a duration of the directional wireless communication link associated with the window. The device according to claim 38, wherein the response window associated with one or more of the directional wireless communication links does not overlap with the response windows associated with other directional wireless communication links . The device according to claim 31, wherein the access parameters include a transmission window for each directional wireless communication link included in the first message, the transmission window indicating a transmission window for the plurality of directional wireless communication A specific directional wireless communication link in the communication link receives a second message from the UE for a dedicated period of time. The device according to claim 31, wherein the access parameters include priority information associated with the plurality of directional wireless communication links, the priority information indicating a ranking of the plurality of directional wireless communication links. The apparatus according to claim 31, wherein the instructions are also executable by the processor to cause the apparatus to perform the following operations: based at least in part on the access parameters included in the first message, via the first message One of the directional wireless communication links included in the directional wireless communication link receives a second message from the UE. The device according to claim 42, wherein the instructions are also executable by the processor to cause the device to perform the following operations: via the one directional wireless communication link of the directional wireless communication links included in the first message Way, sending a response to the second message. The device according to claim 42, wherein the second message is a random access channel (RACH) message. The device according to claim 31, wherein the instructions are also executable by the processor to cause the device to perform the following operations: to direct the wireless communication link via each of the directional wireless communication links included in the first message Receiving a second message; and sending a response via the directional wireless communication link of each of the directional wireless communication links included in the first message. The device according to claim 31, wherein the measurement report and the first message are relayed by the serving base station between the UE and the target base station. The device according to claim 31, wherein the plurality of directional wireless communication links are millimeter wave (mmW) communication links. An apparatus for switching a user equipment (UE) from a serving base station to a target base station in a system includes: a processor; a memory that performs electronic communication with the processor; and instructions, It is stored in the memory and is operable to cause the device to perform the following operations when executed by the processor: sending a measurement report; receiving a first message at the UE, the first message including Each of a plurality of directional wireless communication links between the UE and the target base station directional wireless communication link access parameters, the first message is based at least in part on the measurement report; and at least in part Based on the access parameters included in the first message, a second message is sent via at least one of the directional wireless communication links. The device according to claim 48, wherein the instructions are also executable by the processor to cause the device to: determine a response window for each directional wireless communication link. The apparatus according to claim 49, wherein the decision on the response window for each directional wireless communication link is based at least in part on the access parameters included in the first message. The device according to claim 49, wherein the instructions can also be executed by the processor to cause the device to perform the following operations: during the response window, monitor a selected directional wireless communication chain for a response to the second message. The response window is associated with the selected directional wireless communication link. The device according to claim 49, wherein the response window associated with one or more of the directional wireless communication links is not associated with any other directional wireless of the directional wireless communication links. The response window associated with the communication link overlaps. The device according to claim 48, wherein the instructions are also executable by the processor to cause the device to perform the following operations: on a directional wireless communication link selected in association with at least one of the plurality of directional wireless communication links During a response window, at least one response to the second message is received via the at least one selected directional wireless communication link. The device according to claim 48, wherein the instructions can also be executed by the processor to enable the device to perform the following operations: measure a first signal strength of the serving base station and a second signal strength of the target base station; And generating the measurement report based at least in part on the first signal strength and the second signal strength. The apparatus according to claim 48, wherein the first message makes a random access channel (RACH) resource dedicated to the UE. The device according to claim 48, wherein the instructions are also executable by the processor to cause the device to perform the following operations: selecting one or more of the plurality of directional wireless communication links. The apparatus according to claim 56, wherein the selection of one or more directional wireless communication links is based at least in part on priority information. The apparatus according to claim 56, wherein the selection of the one or more directional wireless communication links is based at least in part on a channel condition of the one or more directional wireless communication links measured by the UE. The device according to claim 48, wherein the instructions are also executable by the processor to cause the device to: determine a mobility state of the UE; and generate the measurement report including the mobility state of the UE . The device according to claim 48, wherein the second message is a random access channel (RACH) message. An apparatus for handover of a user equipment (UE) from a serving base station to a target base station includes: a unit for receiving a measurement report; and for generating at least in part based on the measurement report A unit of a first message, the first message including an access parameter for a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station; and The serving base station sends the first message to a unit of the UE. An apparatus for handover of a user equipment (UE) from a serving base station to a target base station includes: a unit for sending a measurement report; a unit for receiving a first message, the first A message includes an access parameter for a directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station, the first message is based at least in part on the measurement report And a unit for sending a second message via at least one of the directional wireless communication links based on the access parameters included in the first message, at least in part. A non-transitory computer-readable medium storing code for a handover of a user equipment (UE) from a serving base station to a target base station, the code including instructions executable by a processor to perform the following operations Receiving a measurement report; generating a first message based at least in part on the measurement report, the first message including each of a plurality of directional wireless communication links for the UE and the target base station Directional wireless communication link access parameters; and sending the first message to the UE via the serving base station. A non-transitory computer-readable medium that stores a code for a user equipment (UE) handover from a serving base station to a target base station. The code includes a code that can be executed by a processor to perform the following operations: Instruction: send a measurement report; receive a first message, the first message includes access to the directional wireless communication link for each of a plurality of directional wireless communication links between the UE and the target base station Parameters, the first message is based at least in part on the measurement report; and based at least in part on the access parameters included in the first message, via at least one of the directional wireless communication links A communication link to send a second message.